2159553871 has 2 divisors, whose sum is σ = 2159553872. Its totient is φ = 2159553870.

The previous prime is 2159553839. The next prime is 2159553883. The reversal of 2159553871 is 1783559512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2159553871 - 2⁵ = 2159553839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2159550871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079776935 + 1079776936.

It is an arithmetic number, because the mean of its divisors is an integer number (1079776936).

Almost surely, 2^2159553871 is an apocalyptic number.

2159553871 is a deficient number, since it is larger than the sum of its proper divisors (1).

2159553871 is an equidigital number, since it uses as much as digits as its factorization.

2159553871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378000, while the sum is 46.

The square root of 2159553871 is about 46471.0003227819. Note that the first 3 decimals coincide. The cubic root of 2159553871 is about 1292.5718119845.

It can be divided in two parts, 21595 and 53871, that added together give a triangular number (75466 = T₃₈₈).

The spelling of 2159553871 in words is "two billion, one hundred fifty-nine million, five hundred fifty-three thousand, eight hundred seventy-one".